LaTeX forum ⇒ Math & Science ⇒ No numbering for equations

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LatexBeginnerrrr
Posts: 8
Joined: Sun Apr 28, 2019 2:15 am

No numbering for equations

Hello everyone

I am trying to figure out how to delete the automatic numbers - (1), (2)... - that appear next to my equations. I read somewhere I should use \begin{align*} ... \end{align*} instead of \begin{equation} ... \end{equation}, but that ruins my fractions.
This is what I put in LaTeX:
1. We krijgen voor het SIR-model de volgende set differentiaalvergelijkingen:
2. \begin{equation}
3. \frac{dS(t)}{dt} = -\beta.(\frac{S(t)}{P}).I(t) + \alpha R(t) + \mu (P-S(t))
4. \end{equation}
5. \begin{equation}
6. \frac{dI(t)}{dt} = \beta.(\frac{S(t)}{P}).I(t) - \gamma I(t) - \mu I(t)
7. \end{equation}
8. \begin{equation}
9. \frac{dR(t)}{dt} = \gamma.I(t) - \alpha R(t) - \mu R(t)
10. \end{equation}

Does anyone know how to fix this?
Thank you very much.

user22741
Posts: 35
Joined: Fri Nov 09, 2018 12:03 pm
1. $2. \frac{dS(t)}{dt} = -\beta.(\frac{S(t)}{P}).I(t) + \alpha R(t) + \mu (P-S(t)) 3.$

Johannes_B
Site Moderator
Posts: 4044
Joined: Thu Nov 01, 2012 4:08 pm
I would use gather.
1. \documentclass{article}
2. \usepackage{mathtools}
3. \begin{document}
4. \begin{gather*}
5. \frac{dS(t)}{dt} = -\beta.(\frac{S(t)}{P}).I(t) + \alpha R(t) + \mu (P-S(t))\\
6. \frac{dI(t)}{dt} = \beta.(\frac{S(t)}{P}).I(t) - \gamma I(t) - \mu I(t)\\
7. \frac{dR(t)}{dt} = \gamma.I(t) - \alpha R(t) - \mu R(t)
8. \end{gather*}
9. \end{document}
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